diff --git a/stdlib/asyncio/transports.pyi b/stdlib/asyncio/transports.pyi
index fefe9f260..3eb3d1ae3 100644
--- a/stdlib/asyncio/transports.pyi
+++ b/stdlib/asyncio/transports.pyi
@@ -39,7 +39,7 @@ class SubprocessTransport(BaseTransport):
     def get_pid(self) -> int: ...
     def get_returncode(self) -> int | None: ...
     def get_pipe_transport(self, fd: int) -> BaseTransport | None: ...
-    def send_signal(self, signal: int) -> int: ...
+    def send_signal(self, signal: int) -> None: ...
     def terminate(self) -> None: ...
     def kill(self) -> None: ...